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plz help w/ question below regarding leucine and lysine:
2. Are these amino acids considered to be essential amino acids? If so, can mammals synthesize them as well?
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the amino acids are classified essential and non-essential amino acids, based on the ability of the body to synthesize it, those amino acids which can be synthesized in the human body are non-essential amino acids and those amino acids which can not be synthesized and has to be taken via food are essential amino acids.

essential amino acids: Lysine, leucine, histidine, isoleucine, methionine, phenylalanine, threonine, tryptophan, Valine.

Non-essential amino acids: Alanine, Aspartic acid, Arginine, Asparagine, glutamic acid, glutamine, glycine, proline, serine, cysteine, tyrosine.

so leucine and lysine are essential amino acids, mammals cannot synthesize lysine and leucine.

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